Code 39 条形码生成器
将文本编码为 Code 39 条形码。
Code 39 encodes uppercase letters A–Z, digits 0–9 and the symbols - . space $ / + %. It's common in industry and ID badges. Generated locally in your browser.
输入内容以生成条形码。
你的输入在浏览器本地处理，绝不上传。
工作原理
- 1 Type uppercase letters, digits or supported symbols.
- 2 Customize colors and size.
- 3 Download a PNG or SVG.
常见用例
- Create ID or badge barcodes.
- Label industrial and military items.
- Encode part or asset numbers.
- Generate simple alphanumeric codes.
常见问题
Is my input sent to a server?
No. The barcode is generated entirely in your browser — your input is never uploaded, stored or logged.
Which characters are allowed?
Uppercase A–Z, digits 0–9, and the symbols - . space $ / + %. Lowercase letters are not supported by Code 39.
Why is Code 39 wider than Code 128?
Code 39 is lower density (each character takes more bars), so it produces longer barcodes. Use Code 128 for compactness.
Is it really free?
Yes — free, with no signup, no watermark and no limits.